Lumber-truck



W. S. OVERLIN.

LUMBERTRUCK.

APPLlcAUoN FILED Nov. 24. |919.

3 SHEETS-SHEET l.

INVENTOR WMV MMM.,

\ A'iTORNEY W. S. OVERLIN.

LUMBEH TRUCK.

APPLICATION FILED NOV. 24. 1919. 1,349,292 x Aug' 10,

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w s. ovEnLlN. LuMERTRucK.

APPLICATION FILED NOV. 241 I9l9.

Patented Aug. 10,1920.

3 SHEETS-SHEET 3.

(Pro Wilminki UNITED STATES PATENT OFFICE.

WILLIAM S. OVERLIN, 0F PORTLAND, OREGON.

LUMBER-TRUCK.

Application led November 24, 1919.

as the truck disclosed in my Patent No..

1,289,529, issued December 31, 1918, and consists in certain improvements I have made in the power mechanism, that is, Jthe means which transmits the power of the motor either to the driving wheels or to the hoisting mechanism. ln my application filed December 14, 1918, Ser. No. 266,667, and patented Dec. 2, 1919, as No. 1,323,719, l have described and claimed one form of such power transmitting mechanism, and the present form is an improvement upon the same.

it is illustrated in the accompanying three sheets of drawings, in which Figure 1 is a perspective of a truck equipped with the mechanism; Fig. 2 is a plan view of the mechanism, and. Fig. 3 is anv elevation of the same. Figs. 4 and 5 are detail views.

The frame of the truck comprises front and rear arched beam members 10, connected by longitudinal and transverse beams 11, 12, as described in my said patent, and yieldingly supported on the wheels 13 by springs `151e, connected by struts 15 to the wheel spindles. 16 represents the load-engaging'shoes which, as before, are mounted to slide in the legs of the arched beams and are raised and lowered by means of cables 17. n the present instance, these cables pass over guide sheaves 18 in the arch portion of said beams and are wound around front and rear winding drums 19, carried by a longitudinal shaft 20, on which is mounted a worm wheel 21, driven and held against rotation by a worm 22 on a transverse shaft 23, hereinafter called the hoisting shaft, while the shaft 2O will be referred to as the drum shaft. On the inner end of the shaft 23 is keyed a friction wheel .25, which may be of compressed paper, fiber, or the like.

With the periphery of this wheel are adapted to engage one or the other of two friction disks 24 or 26, carried by the motor shaft 27, according as to whether the load is to be raised or lowered. These disks, which may be made of iron, are independently Specification of Letters Patent.

Patented Aug. 1o, 1h20.

Serial No. 340,176.

movable axially of the motor shaft to engage or be disengaged from said friction wheel 25. A convenientway of providing for. this independent movement and that illustrated, is to slidably key one of them,

as 26, to the motor shaft 27 and mount the other, `24, rigidly on the end of said shaft, the shaft itself being axially movable in its bearings. To permit this, it is slidably con' nected to the fly-wheel 28, as shown in The friction disk 24 is adapted to also engage the friction wheel 29, which is slidably keyed on the transverse shaft 30, which is square in vcross-section, as appears in Fig. 3, and carries the casing 31 of the differential gear through which the power is transmitted to the truck wheels 13 by sun gears 32, 33, shafts 34, 35, sprocket wheels 36, 37, and chains 38 thereon, see Fig. 1', in which, however, only one of the chains is shown.

The object of making the friction wheel 29 slidable on the square shaft 30 is to enable the driver to change the speed of the vehicle at will, and to reverse its direction of travel by sliding the wheel 29 past the center of the disk 24. The means for sliding said wheel consists of a member 40, slidable on a fixed rod 41 and having arms 42, provided at their ends with pins 43, engaging in a groove 44, formed in the hub 45 of said wheel. Member 40 is slid on rod 41l by a link 46, secured at one end to said member and at the other end to a bell-crank lever 47, the other'. arm of which is connected by a link 48 to a hand lever 49, pivoted at 50 on the frame in convenient proximity to the drivers seat, not shown.

rlhe means for sliding the friction disk 26 on the motor shaft 27 consists of a forked lever 51, the arms of which have pins 52 engaging in a groove 53, formed in the hub 54 of said disk, said lever being mounted on a transverse rock-shaft 55, on which is a downwardly projecting arm 56, connected at its lower end to the frame by a spring 57 and having a link 58 pivoted to it between its ins 60 engaging in a groove 61 formed ih a collar 6,2, fast on the shaft, the lever being mounted on another transverse rockshaft 63, on which is a downwardly prol jecting arm 64, having a link 65 pivoted to '15 the friction disk 24 or the disk V26. With the parts inthe position shown in Fig. 3, an upward -pull on the lever 71 will cause a pull on the link 65, swing the lever 59 to the right and cause the disk 24 to en age 'thewheel 25, whereby the load is lifted On the other hand, a push downward on the handle 71 causes a push on the link `58, thereby swinging the lever 51 to the left and forcing the disk 26 into engagement with the wheel 25.`

Additional means are provided to hold the shaft in its adjusted position when it is shifted to engage. the disk 24 with the wheel 29 to transmit the power to drive the 30 vehicle, this shifting movement being caused by the driver pressing on a foot pedal 72, theshank of which is pivoted to the end of an arm 7 8, carried by a short rock-shaft 74. y A link 75 connects said arm to an arm 76, fast onthenrock-shaft 63. The shank of the pedal is formed with ratchet teeth 77, with which engages a pawl 78, pivoted on the frame. To lift the pawl out of the teeth,

a link 79 is'pivoted to the shank near thel 40 point of engagement of the latter with the arm '73 and is connected to another link 80, which in turn is pivoted to the pedal 72, pivoted at 82 to the shank. When the pedal is rocked by the foot of the driver y from the full line position to the dotted line position, see Fig. 4, vthe link 79 lifts the pawl out of engagement, as shown in dotted lines, the awl being of suHicient i width, as shown in ig. 5, to rest on both the ratchet of the shank and the link 79. An

idle roller 84, mounted on the frame member'll, serves to support the pedal shank in its movement.

The operation will now be evident. To raise the load, the driver pulls up on the hand lever 71, putting the disk 24 into engagement with the wheel 25, until the load has been lifted suiiiciently, when he releases or pushesA down-on said lever, the spring 83 tending to shift the disk 24 out of en gagement as well as also holdin the disk 26 away from the wheel 25, T e load is maintained'in its elevated position by the engagement of the worm and worm wheel,

the teeth of .which are'of such pitch that the worm cannot be rotated by thefworm wheel. -To start the vehicle, the driver frst slides the wheel 29 near to the axis of the motor shaft 27 by means of the handle 49, and then brings the disk 24 into engagement with the wheel 29 by pressing on the pedal 72. He can lock the pedal against rearward motion when suiicient pressure exists between said disk and wheel, and release it when he wants to stop the vehicle by rocking it on the shank so as to disengage the pawl 78, as described. rlo'lower the load, he pushes down on the hand lever 71, thereby engaging disk 26 with wheel 25.

The mechanism described makes the control Aand manipulation of vehicles of this kind and of their load very simple, convenient and efficient. Naturally, the details need not be exactly as shown and described, the invention resides in the arrangement and combination of the various elements, as set forth in the following claims.

, Whatl claimis:

1. Driving and hoisting mechanism for motor trucks, comprising the combination with the motor and the load-engaging shoes, of a transmission shaft operatively connected to thel truck wheels, `a friction wheel ad'ustable thereon, a hoisting drumV shaft, a friction wheel fast thereon, a motor shaft operatively connected to the motor, two axially movable friction disks thereon, one of said disks being adapted to engage the friction wheel on the drum shaft to rotate the latter in one direction, and the othershaft and the hoisting shaft, of friction` wheels on the' driving and hoisting shafts, a pair of friction disks on the motor shaft,

means to engage one of said disks with the friction wheel-.on the hoisting shaft or with the wheel on the driving shaft, and means to engage 'the other disk with the wheel on the hoisting shaft.

3. Driving and hoisting mechanism for motor trucks, comprising the combination with the wheel driving shaft mounted transversely of the frame and the motor shaftl mounted longitudinally of the frame, of a drum shaft mounted parallel to the motor shaft and a hoisting shaft mounted parallel y to the driving shaft, worm gearing to connect said drum and hoisting shafts, a friction wheel fast on the end of the hoisting shaft, a friction wheel slidable on the driving shaft, a friction disk fast on the end of the motor shaft, means to move the motor shaft to bring said disk 1into engagement with either the friction wheel on the driving 'shaft or the friction wheel on the hoistingshaft, a friction disk slidable on the motor shaft and means to move it into engagement with the friction wheel on the hoisting shaft.

4. In a motor truck of the class described, the combination of parallel motor and hoisting drum shafts, a wheel driving shaft and a hoisting transmission shaft at right angles to said motor and drum shafts, worm gearing connecting said drum and transmission shafts, friction gearin to connect said motor shaft to said driving s aft and to said transmission shaft, and independent means to control said friction gearing according as to whether the load is to be raised or lowered or the truck is to be driven.

5. In a motor truck of the class described, the combination of a motor shaft, a driving shaft, and a hoisting shaft, a friction wheel on the driving shaft, a friction disk on the motor shaft, and a friction wheel on the hoisting shaft, means to brin said disk into engagement with either o said wheels, means to lock it in engagement with the Wheel on the driving shaft, a second friction disk on the motor shaft, and means to bring it into engagement with the wheel on the hoisting shaft.

6. In a truck of the class described, the combination with the motor, the frame uprights, and the load-engaging shoes slidable on the latter, of a drum shaft carrying y, a

worm-wheel and a hoisting drum at each end, cables running from said drums to said shoes whereby' the latter are raised or lowered simultaneously, a hoisting shaft, a worm threonlin mesh with said worm-wheel, a friction wheel on the end of said hoisting shaft, a motor shaft having a sliding con-- nection with the motor, a friction disk fixed thereon and a second friction disk slidable thereon, means to slide the latter into engagement with said friction wheel, means to move said motor shaft to bring said first friction disk into engagement with said friction wheel,a springtending to keep both said disks out of engagement with said wheel, a transmission shaft and means to operatively7 connect it to the driving wheels of the truck, a friction wheel slidable on said transmission shaft,.means tslide said wheel to vary the speed of the driving wheels, means to move the motor shaft to engage the said fixed friction disk with the friction wheel on the transf mission shaft, and means to lock the motor shaft in adjusted position.

' 7. A motor truck adapted to straddle and lift the load', comprising arched frame mem-y bers and load-engaging shoes slidable in the legs thereof, a drum shaft, a pair of drums thereon, cables wound on said drums and running to said shoes, means to drive said shaft in either direction to raise or lower the load including means to sustain the load raised, said driving means comprising a friction wheel and two friction disks either of which can be brought into engagement with said wheel, a differential driving shaft and connections therefrom to the truck wheels, a friction wheel thereon adapted to be engaged by one of said disks, independent means to engage said last mentioned disk with either of said friction Wheels, means to lock it in engagement with the wheel on the driving shaft, and means to engage the other disk with the Wheel in the driving means for the drum shaft. Y

In testimony whereof I have hereunto set my hand.

WILLIAM S. OVERLIN. 

